Results 1 to 13 of 13
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28-09-2009, 11:23 AM #1
Rule of thumb in heat load calculations
dear sir,
please post some rule of thumbs in heat load calculations.depending on the room and temperature.
1.)blast freezer
2.)cold storage room
3.)chiller rooms
4.)anterooms
and other room with other applications for more accurate design and heat load calculations.
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28-09-2009, 12:38 PM #2
Re: Rule of thumb in heat load calculations
Here's a link to Heatcrafts manual. Read it through and you'll have your answer.
http://www.hvacrinfo.com/
Go to:
Refrigeration System Design & Operation
Heatcraft Engineering ManualThousands of HVACR manufacturers links! Visit: www.hvacrinfo.com
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28-09-2009, 01:39 PM #3
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Re: Rule of thumb in heat load calculations
"more accurate design" and "rule of thumb" in same sentence is oksymoron.
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28-09-2009, 10:45 PM #4
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29-09-2009, 01:18 AM #5
Re: Rule of thumb in heat load calculations
Rule of thumb.
Go to the postion of where the new room is going.
Take 10 steps back.
Place thumb 25mm away from left eye. (close right eye)
If you can see the proposed room (area) passed your thumb, then take on step back. Make sure you count the steps back.
Repeat until you can no longer see the proposed room.
Have you counted your steps, yes?
Well for HT rooms 1hp per step
for LT rooms 1.5Hp per step.
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29-09-2009, 01:19 AM #6
Re: Rule of thumb in heat load calculations
Now your are a design engineer, please keep the above post a secret!!!!!!!!!!!!!!!!!
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29-09-2009, 11:30 PM #7
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29-09-2009, 11:39 PM #8
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29-09-2009, 11:58 PM #9
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30-09-2009, 12:17 AM #10
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30-09-2009, 05:07 AM #11
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30-09-2009, 05:25 AM #12
Re: Rule of thumb in heat load calculations
Man, one term., I really hate with a passion is "rule of thumb ".
Every application requires a design for load, product , location, if you do not know the system. Start a career change.
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30-09-2009, 02:42 PM #13
Re: Rule of thumb in heat load calculations
ronaldjayson,
Forget that thumb rule ,do the calculation the old way,i mean the long hand computation.try to avoid using the manufacturer software as much possible.No shortcuts.
regards,Last edited by abet_meneses; 30-09-2009 at 02:43 PM. Reason: spelling
abet
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